MONTEZUMA, Iowa. (AP) — The trial of a man charged in the killing of University of Iowa student Mollie Tibbetts has been delayed. Cristhian Rivera was supposed to be tried in September, but the first-degree murder case was reset Friday to January because of the pandemic and changing orders from the Iowa Supreme Court on when jury trials can resume. Investigators say the 25-year-old Rivera stalked Tibbetts while she was out for a run in the central Iowa town of Brooklyn and stabbed her to death. The 20-year-old Tibbetts disappeared on July 18, 2018. After a massive police and volunteer effort to find her, authorities say, Rivera led them to her body.